WO2013154414A1 - Papel o cartón hidrofóbico con nanopartículas auto-ensambladas y método para elaborarlo - Google Patents
Papel o cartón hidrofóbico con nanopartículas auto-ensambladas y método para elaborarlo Download PDFInfo
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- 230000003042 antagnostic effect Effects 0.000 description 1
- 230000008485 antagonism Effects 0.000 description 1
- 239000002518 antifoaming agent Substances 0.000 description 1
- 239000008346 aqueous phase Substances 0.000 description 1
- 239000007864 aqueous solution Substances 0.000 description 1
- 239000003125 aqueous solvent Substances 0.000 description 1
- 125000003710 aryl alkyl group Chemical group 0.000 description 1
- 125000003118 aryl group Chemical group 0.000 description 1
- 238000004630 atomic force microscopy Methods 0.000 description 1
- QVGXLLKOCUKJST-UHFFFAOYSA-N atomic oxygen Chemical compound [O] QVGXLLKOCUKJST-UHFFFAOYSA-N 0.000 description 1
- 235000013361 beverage Nutrition 0.000 description 1
- 239000003124 biologic agent Substances 0.000 description 1
- 239000007844 bleaching agent Substances 0.000 description 1
- 229920001400 block copolymer Polymers 0.000 description 1
- 238000009835 boiling Methods 0.000 description 1
- 229910021538 borax Inorganic materials 0.000 description 1
- DQXBYHZEEUGOBF-UHFFFAOYSA-N but-3-enoic acid;ethene Chemical compound C=C.OC(=O)CC=C DQXBYHZEEUGOBF-UHFFFAOYSA-N 0.000 description 1
- 229910021393 carbon nanotube Inorganic materials 0.000 description 1
- 239000002041 carbon nanotube Substances 0.000 description 1
- 239000007833 carbon precursor Substances 0.000 description 1
- 125000002091 cationic group Chemical group 0.000 description 1
- 229920002301 cellulose acetate Polymers 0.000 description 1
- 230000008859 change Effects 0.000 description 1
- 239000013043 chemical agent Substances 0.000 description 1
- 239000010415 colloidal nanoparticle Substances 0.000 description 1
- 230000000052 comparative effect Effects 0.000 description 1
- 239000004567 concrete Substances 0.000 description 1
- 238000006482 condensation reaction Methods 0.000 description 1
- 238000007334 copolymerization reaction Methods 0.000 description 1
- 235000005822 corn Nutrition 0.000 description 1
- 230000007797 corrosion Effects 0.000 description 1
- 238000005260 corrosion Methods 0.000 description 1
- 230000001687 destabilization Effects 0.000 description 1
- 230000006866 deterioration Effects 0.000 description 1
- 230000003292 diminished effect Effects 0.000 description 1
- FPAFDBFIGPHWGO-UHFFFAOYSA-N dioxosilane;oxomagnesium;hydrate Chemical compound O.[Mg]=O.[Mg]=O.[Mg]=O.O=[Si]=O.O=[Si]=O.O=[Si]=O.O=[Si]=O FPAFDBFIGPHWGO-UHFFFAOYSA-N 0.000 description 1
- KPUWHANPEXNPJT-UHFFFAOYSA-N disiloxane Chemical class [SiH3]O[SiH3] KPUWHANPEXNPJT-UHFFFAOYSA-N 0.000 description 1
- 239000002612 dispersion medium Substances 0.000 description 1
- 239000000428 dust Substances 0.000 description 1
- 229920001971 elastomer Polymers 0.000 description 1
- 230000009881 electrostatic interaction Effects 0.000 description 1
- 230000002708 enhancing effect Effects 0.000 description 1
- 239000003822 epoxy resin Substances 0.000 description 1
- 150000002148 esters Chemical class 0.000 description 1
- IDGUHHHQCWSQLU-UHFFFAOYSA-N ethanol;hydrate Chemical compound O.CCO IDGUHHHQCWSQLU-UHFFFAOYSA-N 0.000 description 1
- 239000005038 ethylene vinyl acetate Substances 0.000 description 1
- 230000001747 exhibiting effect Effects 0.000 description 1
- 238000001125 extrusion Methods 0.000 description 1
- 239000004744 fabric Substances 0.000 description 1
- 238000000445 field-emission scanning electron microscopy Methods 0.000 description 1
- 239000003063 flame retardant Substances 0.000 description 1
- 239000008394 flocculating agent Substances 0.000 description 1
- 238000001506 fluorescence spectroscopy Methods 0.000 description 1
- 239000011737 fluorine Substances 0.000 description 1
- 229910052731 fluorine Inorganic materials 0.000 description 1
- 238000009920 food preservation Methods 0.000 description 1
- 238000009472 formulation Methods 0.000 description 1
- 229910003472 fullerene Inorganic materials 0.000 description 1
- WOLATMHLPFJRGC-UHFFFAOYSA-N furan-2,5-dione;styrene Chemical compound O=C1OC(=O)C=C1.C=CC1=CC=CC=C1 WOLATMHLPFJRGC-UHFFFAOYSA-N 0.000 description 1
- ZZUFCTLCJUWOSV-UHFFFAOYSA-N furosemide Chemical compound C1=C(Cl)C(S(=O)(=O)N)=CC(C(O)=O)=C1NCC1=CC=CO1 ZZUFCTLCJUWOSV-UHFFFAOYSA-N 0.000 description 1
- 230000009477 glass transition Effects 0.000 description 1
- 239000003292 glue Substances 0.000 description 1
- 150000004676 glycans Chemical class 0.000 description 1
- 239000004519 grease Substances 0.000 description 1
- LNEPOXFFQSENCJ-UHFFFAOYSA-N haloperidol Chemical compound C1CC(O)(C=2C=CC(Cl)=CC=2)CCN1CCCC(=O)C1=CC=C(F)C=C1 LNEPOXFFQSENCJ-UHFFFAOYSA-N 0.000 description 1
- 239000008240 homogeneous mixture Substances 0.000 description 1
- 229920001519 homopolymer Polymers 0.000 description 1
- 239000012943 hotmelt Substances 0.000 description 1
- 230000007062 hydrolysis Effects 0.000 description 1
- XQSFXFQDJCDXDT-UHFFFAOYSA-N hydroxysilicon Chemical group [Si]O XQSFXFQDJCDXDT-UHFFFAOYSA-N 0.000 description 1
- 238000007641 inkjet printing Methods 0.000 description 1
- 229910052809 inorganic oxide Inorganic materials 0.000 description 1
- 238000009413 insulation Methods 0.000 description 1
- NLYAJNPCOHFWQQ-UHFFFAOYSA-N kaolin Chemical compound O.O.O=[Al]O[Si](=O)O[Si](=O)O[Al]=O NLYAJNPCOHFWQQ-UHFFFAOYSA-N 0.000 description 1
- 238000002372 labelling Methods 0.000 description 1
- 239000012705 liquid precursor Substances 0.000 description 1
- 229910044991 metal oxide Inorganic materials 0.000 description 1
- 150000004706 metal oxides Chemical class 0.000 description 1
- 239000013528 metallic particle Substances 0.000 description 1
- 238000001465 metallisation Methods 0.000 description 1
- GDOPTJXRTPNYNR-UHFFFAOYSA-N methyl-cyclopentane Natural products CC1CCCC1 GDOPTJXRTPNYNR-UHFFFAOYSA-N 0.000 description 1
- 239000011859 microparticle Substances 0.000 description 1
- 238000000386 microscopy Methods 0.000 description 1
- 239000002052 molecular layer Substances 0.000 description 1
- 239000002103 nanocoating Substances 0.000 description 1
- 239000011858 nanopowder Substances 0.000 description 1
- 239000002071 nanotube Substances 0.000 description 1
- 239000005445 natural material Substances 0.000 description 1
- 229920005615 natural polymer Polymers 0.000 description 1
- 239000004745 nonwoven fabric Substances 0.000 description 1
- 229920001778 nylon Polymers 0.000 description 1
- 238000007645 offset printing Methods 0.000 description 1
- 238000005457 optimization Methods 0.000 description 1
- 125000000962 organic group Chemical group 0.000 description 1
- 239000011368 organic material Substances 0.000 description 1
- 239000012860 organic pigment Substances 0.000 description 1
- 229920000620 organic polymer Polymers 0.000 description 1
- 239000003960 organic solvent Substances 0.000 description 1
- 150000001282 organosilanes Chemical class 0.000 description 1
- 230000003647 oxidation Effects 0.000 description 1
- 238000007254 oxidation reaction Methods 0.000 description 1
- 125000005429 oxyalkyl group Chemical group 0.000 description 1
- 239000001301 oxygen Substances 0.000 description 1
- 229910052760 oxygen Inorganic materials 0.000 description 1
- SOQBVABWOPYFQZ-UHFFFAOYSA-N oxygen(2-);titanium(4+) Chemical class [O-2].[O-2].[Ti+4] SOQBVABWOPYFQZ-UHFFFAOYSA-N 0.000 description 1
- 239000003973 paint Substances 0.000 description 1
- 239000011101 paper laminate Substances 0.000 description 1
- 230000035699 permeability Effects 0.000 description 1
- 238000005191 phase separation Methods 0.000 description 1
- 108091008695 photoreceptors Proteins 0.000 description 1
- 239000004014 plasticizer Substances 0.000 description 1
- 229920000233 poly(alkylene oxides) Polymers 0.000 description 1
- 229920001200 poly(ethylene-vinyl acetate) Polymers 0.000 description 1
- 229920002492 poly(sulfone) Polymers 0.000 description 1
- 229920001197 polyacetylene Polymers 0.000 description 1
- 239000004584 polyacrylic acid Substances 0.000 description 1
- 229920001281 polyalkylene Polymers 0.000 description 1
- 239000004632 polycaprolactone Substances 0.000 description 1
- 229920001610 polycaprolactone Polymers 0.000 description 1
- 229920000515 polycarbonate Polymers 0.000 description 1
- 239000004417 polycarbonate Substances 0.000 description 1
- 229920000647 polyepoxide Polymers 0.000 description 1
- 229920000570 polyether Polymers 0.000 description 1
- 229920001470 polyketone Polymers 0.000 description 1
- 229920006254 polymer film Polymers 0.000 description 1
- 229920001184 polypeptide Polymers 0.000 description 1
- 239000005077 polysulfide Substances 0.000 description 1
- 229920001021 polysulfide Polymers 0.000 description 1
- 150000008117 polysulfides Polymers 0.000 description 1
- 229920001343 polytetrafluoroethylene Polymers 0.000 description 1
- 239000004810 polytetrafluoroethylene Substances 0.000 description 1
- 229920001290 polyvinyl ester Polymers 0.000 description 1
- 239000011148 porous material Substances 0.000 description 1
- 229910000027 potassium carbonate Inorganic materials 0.000 description 1
- 238000001556 precipitation Methods 0.000 description 1
- 239000003755 preservative agent Substances 0.000 description 1
- 102000004196 processed proteins & peptides Human genes 0.000 description 1
- 108090000765 processed proteins & peptides Proteins 0.000 description 1
- 230000001681 protective effect Effects 0.000 description 1
- 239000011241 protective layer Substances 0.000 description 1
- 102000004169 proteins and genes Human genes 0.000 description 1
- 108090000623 proteins and genes Proteins 0.000 description 1
- 230000005855 radiation Effects 0.000 description 1
- 238000010526 radical polymerization reaction Methods 0.000 description 1
- 239000004627 regenerated cellulose Substances 0.000 description 1
- 230000002787 reinforcement Effects 0.000 description 1
- 239000005060 rubber Substances 0.000 description 1
- 229920006395 saturated elastomer Polymers 0.000 description 1
- 239000013545 self-assembled monolayer Substances 0.000 description 1
- 238000000926 separation method Methods 0.000 description 1
- 125000005372 silanol group Chemical group 0.000 description 1
- 150000004760 silicates Chemical class 0.000 description 1
- 239000010703 silicon Substances 0.000 description 1
- 150000003377 silicon compounds Chemical class 0.000 description 1
- NTHWMYGWWRZVTN-UHFFFAOYSA-N sodium silicate Chemical compound [Na+].[Na+].[O-][Si]([O-])=O NTHWMYGWWRZVTN-UHFFFAOYSA-N 0.000 description 1
- 229910052911 sodium silicate Inorganic materials 0.000 description 1
- 239000004328 sodium tetraborate Substances 0.000 description 1
- 235000010339 sodium tetraborate Nutrition 0.000 description 1
- 238000001179 sorption measurement Methods 0.000 description 1
- 238000010186 staining Methods 0.000 description 1
- 238000006557 surface reaction Methods 0.000 description 1
- 230000008961 swelling Effects 0.000 description 1
- 239000000454 talc Substances 0.000 description 1
- 235000012222 talc Nutrition 0.000 description 1
- 229910052623 talc Inorganic materials 0.000 description 1
- 230000008719 thickening Effects 0.000 description 1
- 239000002562 thickening agent Substances 0.000 description 1
- 229910052718 tin Inorganic materials 0.000 description 1
- XOLBLPGZBRYERU-UHFFFAOYSA-N tin dioxide Chemical compound O=[Sn]=O XOLBLPGZBRYERU-UHFFFAOYSA-N 0.000 description 1
- 229910001887 tin oxide Inorganic materials 0.000 description 1
- HLLICFJUWSZHRJ-UHFFFAOYSA-N tioxidazole Chemical compound CCCOC1=CC=C2N=C(NC(=O)OC)SC2=C1 HLLICFJUWSZHRJ-UHFFFAOYSA-N 0.000 description 1
- 238000012876 topography Methods 0.000 description 1
- KHPCPRHQVVSZAH-UHFFFAOYSA-N trans-cinnamyl beta-D-glucopyranoside Natural products OC1C(O)C(O)C(CO)OC1OCC=CC1=CC=CC=C1 KHPCPRHQVVSZAH-UHFFFAOYSA-N 0.000 description 1
- 238000012546 transfer Methods 0.000 description 1
- 238000004627 transmission electron microscopy Methods 0.000 description 1
- ILJSQTXMGCGYMG-UHFFFAOYSA-N triacetic acid Chemical compound CC(=O)CC(=O)CC(O)=O ILJSQTXMGCGYMG-UHFFFAOYSA-N 0.000 description 1
- JTTSZDBCLAKKAY-UHFFFAOYSA-N trimethoxy-[3-(3-trimethoxysilylpropyltetrasulfanyl)propyl]silane Chemical compound CO[Si](OC)(OC)CCCSSSSCCC[Si](OC)(OC)OC JTTSZDBCLAKKAY-UHFFFAOYSA-N 0.000 description 1
- PZJJKWKADRNWSW-UHFFFAOYSA-N trimethoxysilicon Chemical group CO[Si](OC)OC PZJJKWKADRNWSW-UHFFFAOYSA-N 0.000 description 1
- 238000001132 ultrasonic dispersion Methods 0.000 description 1
- 229920003169 water-soluble polymer Polymers 0.000 description 1
- 238000009736 wetting Methods 0.000 description 1
- 239000002023 wood Substances 0.000 description 1
- 210000002268 wool Anatomy 0.000 description 1
- 239000002759 woven fabric Substances 0.000 description 1
Classifications
-
- D—TEXTILES; PAPER
- D21—PAPER-MAKING; PRODUCTION OF CELLULOSE
- D21H—PULP COMPOSITIONS; PREPARATION THEREOF NOT COVERED BY SUBCLASSES D21C OR D21D; IMPREGNATING OR COATING OF PAPER; TREATMENT OF FINISHED PAPER NOT COVERED BY CLASS B31 OR SUBCLASS D21G; PAPER NOT OTHERWISE PROVIDED FOR
- D21H17/00—Non-fibrous material added to the pulp, characterised by its constitution; Paper-impregnating material characterised by its constitution
- D21H17/03—Non-macromolecular organic compounds
- D21H17/05—Non-macromolecular organic compounds containing elements other than carbon and hydrogen only
- D21H17/11—Halides
-
- D—TEXTILES; PAPER
- D21—PAPER-MAKING; PRODUCTION OF CELLULOSE
- D21H—PULP COMPOSITIONS; PREPARATION THEREOF NOT COVERED BY SUBCLASSES D21C OR D21D; IMPREGNATING OR COATING OF PAPER; TREATMENT OF FINISHED PAPER NOT COVERED BY CLASS B31 OR SUBCLASS D21G; PAPER NOT OTHERWISE PROVIDED FOR
- D21H11/00—Pulp or paper, comprising cellulose or lignocellulose fibres of natural origin only
-
- D—TEXTILES; PAPER
- D21—PAPER-MAKING; PRODUCTION OF CELLULOSE
- D21H—PULP COMPOSITIONS; PREPARATION THEREOF NOT COVERED BY SUBCLASSES D21C OR D21D; IMPREGNATING OR COATING OF PAPER; TREATMENT OF FINISHED PAPER NOT COVERED BY CLASS B31 OR SUBCLASS D21G; PAPER NOT OTHERWISE PROVIDED FOR
- D21H17/00—Non-fibrous material added to the pulp, characterised by its constitution; Paper-impregnating material characterised by its constitution
- D21H17/03—Non-macromolecular organic compounds
- D21H17/05—Non-macromolecular organic compounds containing elements other than carbon and hydrogen only
- D21H17/13—Silicon-containing compounds
-
- D—TEXTILES; PAPER
- D21—PAPER-MAKING; PRODUCTION OF CELLULOSE
- D21H—PULP COMPOSITIONS; PREPARATION THEREOF NOT COVERED BY SUBCLASSES D21C OR D21D; IMPREGNATING OR COATING OF PAPER; TREATMENT OF FINISHED PAPER NOT COVERED BY CLASS B31 OR SUBCLASS D21G; PAPER NOT OTHERWISE PROVIDED FOR
- D21H17/00—Non-fibrous material added to the pulp, characterised by its constitution; Paper-impregnating material characterised by its constitution
- D21H17/63—Inorganic compounds
- D21H17/67—Water-insoluble compounds, e.g. fillers, pigments
-
- D—TEXTILES; PAPER
- D21—PAPER-MAKING; PRODUCTION OF CELLULOSE
- D21H—PULP COMPOSITIONS; PREPARATION THEREOF NOT COVERED BY SUBCLASSES D21C OR D21D; IMPREGNATING OR COATING OF PAPER; TREATMENT OF FINISHED PAPER NOT COVERED BY CLASS B31 OR SUBCLASS D21G; PAPER NOT OTHERWISE PROVIDED FOR
- D21H17/00—Non-fibrous material added to the pulp, characterised by its constitution; Paper-impregnating material characterised by its constitution
- D21H17/63—Inorganic compounds
- D21H17/67—Water-insoluble compounds, e.g. fillers, pigments
- D21H17/675—Oxides, hydroxides or carbonates
-
- D—TEXTILES; PAPER
- D21—PAPER-MAKING; PRODUCTION OF CELLULOSE
- D21H—PULP COMPOSITIONS; PREPARATION THEREOF NOT COVERED BY SUBCLASSES D21C OR D21D; IMPREGNATING OR COATING OF PAPER; TREATMENT OF FINISHED PAPER NOT COVERED BY CLASS B31 OR SUBCLASS D21G; PAPER NOT OTHERWISE PROVIDED FOR
- D21H17/00—Non-fibrous material added to the pulp, characterised by its constitution; Paper-impregnating material characterised by its constitution
- D21H17/71—Mixtures of material ; Pulp or paper comprising several different materials not incorporated by special processes
- D21H17/72—Mixtures of material ; Pulp or paper comprising several different materials not incorporated by special processes of organic material
-
- D—TEXTILES; PAPER
- D21—PAPER-MAKING; PRODUCTION OF CELLULOSE
- D21H—PULP COMPOSITIONS; PREPARATION THEREOF NOT COVERED BY SUBCLASSES D21C OR D21D; IMPREGNATING OR COATING OF PAPER; TREATMENT OF FINISHED PAPER NOT COVERED BY CLASS B31 OR SUBCLASS D21G; PAPER NOT OTHERWISE PROVIDED FOR
- D21H19/00—Coated paper; Coating material
- D21H19/36—Coatings with pigments
- D21H19/38—Coatings with pigments characterised by the pigments
- D21H19/385—Oxides, hydroxides or carbonates
-
- D—TEXTILES; PAPER
- D21—PAPER-MAKING; PRODUCTION OF CELLULOSE
- D21H—PULP COMPOSITIONS; PREPARATION THEREOF NOT COVERED BY SUBCLASSES D21C OR D21D; IMPREGNATING OR COATING OF PAPER; TREATMENT OF FINISHED PAPER NOT COVERED BY CLASS B31 OR SUBCLASS D21G; PAPER NOT OTHERWISE PROVIDED FOR
- D21H21/00—Non-fibrous material added to the pulp, characterised by its function, form or properties; Paper-impregnating or coating material, characterised by its function, form or properties
- D21H21/14—Non-fibrous material added to the pulp, characterised by its function, form or properties; Paper-impregnating or coating material, characterised by its function, form or properties characterised by function or properties in or on the paper
- D21H21/16—Sizing or water-repelling agents
-
- D—TEXTILES; PAPER
- D21—PAPER-MAKING; PRODUCTION OF CELLULOSE
- D21H—PULP COMPOSITIONS; PREPARATION THEREOF NOT COVERED BY SUBCLASSES D21C OR D21D; IMPREGNATING OR COATING OF PAPER; TREATMENT OF FINISHED PAPER NOT COVERED BY CLASS B31 OR SUBCLASS D21G; PAPER NOT OTHERWISE PROVIDED FOR
- D21H21/00—Non-fibrous material added to the pulp, characterised by its function, form or properties; Paper-impregnating or coating material, characterised by its function, form or properties
- D21H21/50—Non-fibrous material added to the pulp, characterised by its function, form or properties; Paper-impregnating or coating material, characterised by its function, form or properties characterised by form
- D21H21/52—Additives of definite length or shape
Definitions
- the present invention is related to coating materials; more specifically to a method for making a hydrophobic paper or cardboard with self-assembled silicon oxide nanoparticles with functional groups of silanes and fluorocarbon compounds bonded directly to the cellulose fibers of the paper or cardboard.
- nanoparticles for this application represents a great economic advantage for these packages, since the interaction between the cellulose network and the coating nanoparticles can be increased thanks to the incorporation of various functional groups on the nanoparticles, resulting in the improvement of hydrophobic properties due to chemical interactions between them and the organic matrix.
- inorganic particles as in the case of silicon oxide, have a surface that has a lower compatibility with organic compounds such as polymeric polyolefins or ionic type amides or amines, paper fibers or other biopolymers.
- the surface of the nanoparticles react by different methods, for example, by self-assembling with products that contain groups that when reacting can be more compatible with the polymers and allow better hydrophobic properties.
- by chemical modification functional groups are added to the surface of the nanoparticles to allow better incorporation or compatibility with organic products such as polymers or other matrices of materials such as paper.
- a super-hydrophobic or ultra-hydrophobic coating composition which include a polymer that can be a homopolymer or compolymer of polyalkylene, polyacrylate, polymethyl acrylate, polyester, polyamide, polyurethane, polyvinylarylene, polyvinyl ester, polyvinylene / alkylene copolymer, polyalkylene oxide or combinations thereof with particles having an average size of 1 nm to 25 microns, such that it propitiates a water contact angle between about 120 ° and about 150 ° or more.
- the particle is made of silica which has been previously treated with a silane.
- Patent US7927458 called "Paper articles exhibiting water resistance and method for making same” refers to a process for preparing glued paper and cardboard which incorporates in the process a composition comprising one or more hydrophobic polymers wherein the hydrophobic polymers, the amount of such polymers and the proportion by weight of starch and such polymer in the composition are selected such that the paper and cardboard exhibits a Cobb value equal to or less than 25 g / m 2 and a glued paper or cardboard formed by the process.
- Document US7229678 called "Barrier laminate structure for packaging beverages” describes a laminated packaging material, which comprises from a first outer layer of a low density polyethylene polymer, a cardboard substrate, a first layer of inner laminated nylon coating with a resin bonding layer, an extrusion blown layer comprising a first low density polyethylene polymer layer, a bonding layer, a first inner layer of EVOH, a second bonding layer, a second inner layer of EVOH, a third tie layer and a second inner layer of low density polyethylene of polymer, and a more internal layer in contact with low density polyethylene product.
- Patent US6830657 called "Hydrophobic cationic dispersions stabilized by low molecular weight maleimide copolymers, for paper sizing” refers to a method for obtaining an aqueous dispersion of hydrophobic polymers dispersed in the form of particles with an average diameter less than 100 nm stabilized only with a macromolecular surfactant based on a low molecular weight styrene / maleic imide anhydride copolymer. It also refers to the use of said dispersion for the treatment of paper.
- US4268069 entitled "Paper coated with a microcapsular coating composition containing a hydrophobic silica” describes a composition of a coating comprising, oil containing microcapsules dispersed in a continuous aqueous phase, which also contains finely divided silica phase particles and a binder for said microcapsules and said silica particles.
- the silica particles have been treated with an organic material such as an organic silicon compound to give the particles a hydrophobic surface.
- the coating composition has utility in the manufacture of paper coated with microcapsules. Such paper is characterized by a substantial reduction in staining when used in photocopying devices that use a pressure contact line to help transfer the dust image of a photoreceptor belt to the paper.
- US20110008585 patent application entitled "Water-resistant corrugated paperboard and method of preparing the same” describes a method for preparing water-resistant corrugated cardboard composed of a corrugated medium treated with a hydrophobic agent on both sides and a liner-treated with a hydrophobic agent on at least one side of the surface.
- the lining and the corrugated medium are adhered by an adhesive prepared with a starch carrier, raw starch, borax, a hydrophobic resin, an additive to improve penetration and water.
- the starch carrier is composed of cooked and raw starch.
- the liner and the corrugated medium are treated with the hydrophobic agent before being glued.
- Hydrophobic resins include resorcinol-formaldehyde resins, urea-formaldehyde resins.
- Patent application US20110081509A1 entitled “Degradable heat insulation container” describes a container that includes a container body made of paper, a waterproofing layer and a layer of foam.
- the container body has an outer surface and an inner surface.
- the waterproofing layer is coated on the inner surface.
- the waterproofing layer is mainly composed of talcum powder, carbonate resin and calcium.
- the foam layer is disposed on at least a part of the outer surface.
- the foam layer consists of reinforcements and a thermo-expandable powder.
- the binder is selected from a group consisting of polyvinyl acetate resin, ethylene vinyl acetate resin, polyacrylic acid resin and a mixture thereof.
- the thermo-expandable powder is formed by a plurality of thermo-expandable microcapsules, each of which consists of a thermoplastic polymer shell and a low boiling solvent lined by the thermoplastic polymer shell.
- Patent application US20110033663 entitled “Superhydrophobic and superhydrophilic materials, surfaces and methods” describes a method of general application that does not require more than one step which facilitates the preparation of superhydrophilic or super hydrophobic large area surfaces in a variety of substrates such as glass, metal, plastic, paper, wood, concrete and masonry.
- the technique involves free radical polymerization of common acrylic or stretch monomers in the presence of porgenic solvents in a mold or on a free surface.
- Patent application US20100233468 entitled “Biodegradable nano-composition for application of protective coatings onto natural materials” refers to a method for manufacturing a biodegradable composition containing cellulose nanoparticles to form a protective coating on natural materials.
- One of its objects is to provide a composition to form a protective coating layer on a biodegradable natural material that imparts water resistance and grease resistance to the material. It is another object to provide a composition to form a protective layer in biodegradable natural materials It is based on the use of nano cellulose particles and protects these materials from swelling, deformation and mechanical damage during contact with water, other aqueous liquids, or greases.
- Patent application US20100311889 entitled "Method for manufacturing a coating slip, using an acrylic thickener with a branched hydrophobic chain, and the slip obtained" consists of a method for manufacturing a coated paper sheet containing a mineral material, using , as an agent for thickening the sheet, a water soluble polymer comprising at least one ethylene-unsaturated anionic monomer and at least one ethylene-unsaturated oxyalkyl monomer ending in a hydrophobic alkyl, alkaryl, arylalkyl chain, aryl, saturated or unsaturated , branched with 14 to 21 carbon atoms and two branches each with at least six carbon atoms.
- the polymer is added to the sheet either directly, or during an earlier stage when the mineral material is ground, dispersed, or concentrated in water, which may or may not be followed by a drying stage. In this way, the water retention of the slip is improved, which contributes to a better printability of the paper coated by the sheet.
- US20080188154 with the name "Film laminate” describes a laminate that includes at least one layer of an environmentally degradable film, for example, a polylactide ("PLA”) made of an easily available annually renewable polymer, from resources such as corn.
- a second layer may be a substrate made of, for example, paper, woven or non-woven fabric or metal sheets.
- the environmentally degradable film and the substrate are adhered to each other by, for example, extruded polymers or adhesives such as water-based, hot melt, solvent or solvent-free adhesives.
- the choice of adherent depends on the type of substrate to be laminated with the environmentally degradable film and the desired properties of the resulting laminated composite structure (ie, "laminate").
- the first layer is coated with a liquid polymer, a nano-particle dispersion, a metal deposition or a silicone oxide deposition such that the gas permeability of the first layer is reduced.
- a liquid polymer a nano-particle dispersion, a metal deposition or a silicone oxide deposition
- Such laminated films find use, for example, in packaging, envelopes, labels and printing forms, commercial publications and in the digital printing industry.
- Nanodispersed cellulose and in combination with other components such as binders, polyvinyl sheets, flocculants, nanoparticle systems (not mentioned), polymers, non-slip additives, an additive for pigment fixation, bleaches, defoamers or preservatives.
- Patent application US20080113188 entitled "Hydrophobic organic-organic hybrid silane coatings” describes a hydrophobic coating that can be formed from a solution that includes, for example, organically modified silicates mixed with coupling agents.
- a sol-gel solution can be formed (for example, at room temperature) which includes a plurality of alkoxy silane precursors containing at least one alkoxy silane glycidoxy precursor.
- the sol-gel solution may be a mixed sol-gel solution formed including a first solution mixed with a second solution.
- the first solution may include one or more alkoxy silane precursors
- the second solution may include at least one alkoxy glycidoxy silane precursor.
- a coupling agent can be added and reacted with the sol-gel solution (mixed) forming the coating solution, which can be applied on a substrate that needs to be protected against corrosion or from biological and chemical agents.
- compositions comprising anionic functionalized polyorganosiloxanes for hydrophobically modifying surfaces and enhancing delivery of active agents to surfaces treated therewith
- compositions and methods for treating and modifying surfaces and for improving the supply of active agents to the treated surfaces are described with it, where the Compositions comprise siloxane polymers functionalized with outstanding fractions comprising two or more anionic groups, at least one anionic group which may be a carboxy group.
- the present composition forms a substantially hydrophobic functionalized siloxanoanionic polymer layer on the treated surface.
- the patent application US20030012897 called "Liquid-resistant paperboard tube, and method and apparatus for making same” refers to a cardboard tube that becomes liquid resistant by the partial or total coating of the tube with particles of submicron size of material inorganic that are treated to be hydrophobic and / or oleophobic.
- the particles can be applied directly to the cardboard, staying in the surface pores so that the particles adhere to the cardboard.
- a thin layer of a sticky binder or adhesive can be applied first to the cardboard and then the particles can be applied such that they adhere to the binder.
- the particles have a large surface area per gram; In one embodiment, for example, the silica particles that are employed have a surface area of about 90 ⁇ 130 m 2 / g. As a result, the particles create a surface on the cardboard that is highly liquid repellent.
- Patent application US20030109617 entitled "Method for pretreatment of filler, modified filler with a hydrophobic polymer and use of the hydrophobic polymer” describes a modified filler used in the manufacture of paper or the like, the preparation of the filler material and its use.
- the modified filler comprises a filler known as for example calcium carbonate, kaolin, talc, titanium dioxide, sodium silicate and aluminum trihydrate or mixtures thereof, and a hydrophobic polymer made of polymerizable monomers, which is added to the filler as a polymer dispersion or a polymer solution.
- Patent application US20020069989 entitled “Bonding of paper using latex-dispersions of copolymers made of hydrophobic monomers / polymers of styrene / maleic anhydride type of low molecular mass” describes latex dispersions used in formulations of a paper binder. which make it possible to obtain acceptable COBB values, even with printing and writing papers or wrapping papers obtained from recycled pulps or mechanically destined pulps.
- US20020032254 patent application entitled "Hydrophobic polymer dispersion and process for the preparation thereof” refers to a hydrophobic polymer dispersion and a solvent-free process for the preparation thereof.
- the dispersion contains starch ester, together with dispersion additives known as such.
- the polymer is first mixed with a plasticizer to obtain a mixture of plasticized polymer.
- the mixture of plasticized polymers is then mixed with dispersion additives and water at an elevated temperature to form a dispersion.
- the plasticization of the polymer and the dispersion of the mixture in water can be carried out in an extruder.
- the dispersion obtained is homogenized in order to improve its stability.
- the dispersion obtained by the invention can be used for coating paper or cardboard, as a base or a component of paint or in labeling adhesives, and is also suitable for the production of deposited films and as a binder in fiber-based materials of cellulose, as well as for medicinal coating preparations.
- Patent application WO2011059398A1 called “Strong nanopaper” refers to a nano-paper comprising a clay and microfibrillated cellulose nanofibers in which the MFC nanofibers and the clay layers are oriented substantially parallel to the surface of the paper.
- the invention further relates to a method for manufacturing the nano paper and the use thereof.
- Patent application WO2009091406A1 with the title "Coated paperboard with enhanced compressibility” mentions a coated cardboard with a better understandability, which allows a smoothness improvement at a low surface pressure.
- the understandable coating is based on nanofibers with a diameter of less than 1000 nm.
- One of the claims is that the PakerPrint smootheness index increases 1.2 units when the surface pressure increases between 5 to 10 Kgf / cm 2 .
- the procedure indicated in the TAPPI T555 Om-99 standard is applied.
- Biopolymers natural polymer, chitosan, a bicompatible polymer, polycaprolactone, polyethylene oxide, and combinations thereof. 2).
- Inorganic compounds silica, aluminosilicates, TiO, TiN, Nb Os, Ta 2 Os, TiN oxide, among others. 3).
- Resins such as polyester, ether and cellulose ester, polyacrylic resin, polysulfide, copolymers, etc.
- a binder that can be a polymer selected from the group of polyvinyl alcohol, polyvinylpyrrolidone and combinations thereof.
- the nanofibers can be improved by adding oleophobic and hydrophobic additives that can be compounds with fluorocarbon groups.
- Patent application WO2008023170A1 entitled “Tailored control of surface properties by chemical modification” describes a process for producing a polymer or an inorganic substrate that is capable of adhering to more than one material by functionalizing the surface by bonding the substrate with a carbon precursor.
- Nanoparticles (C 60 fullerenes or nanotubes) present in an adherent system that It comprises a polymer that can be selected from polyolefins, polyesters, epoxy resins, polyacrylates, polyacrylics, polyamides, polytetrafluoroethylene, polyglycosides, polypeptides, polycarbonates, polyethers, polyketones, rubbers, polyurethanes polysulfones, polyvinyl, cellulose and block copolymers.
- a polymer that can be selected from polyolefins, polyesters, epoxy resins, polyacrylates, polyacrylics, polyamides, polytetrafluoroethylene, polyglycosides, polypeptides, polycarbonates, polyethers, polyketones, rubbers, polyurethanes polysulfones, polyvinyl, cellulose and block copolymers.
- Patent application WO2004035929A1 entitled "Method of producing a multilayer coated substrate having improved barrier properties” describes the production of a coated substrate consisting of the formation of a multilayer free flowing compound, with at least two layers with different barrier function and the contact mechanism of the compound to the substrate. Depending on the anti-road function, the number of layers will be required.
- Laminar nanoparticles (not mentioned), which are immersed in a binder that can be styrene-butadiene latex, acrylic styrene, acrylonitrile latex, maleic anhydrous latex, polysaccharides, proteins, polyvinylpyrrolidone, polyvinyl alcohol, polyvinyl acetate, cellulose acetate derivatives, among others.
- the claims for the coated substrate are: 1). Vapor transmission rate less than 40 g / (m 2 / day). 2). Cobb value 10 minutes less than 12 g / m 2 . 3). Value oxygen transmission of less than 150 cm 3 / (m 2/24) h / bar) (1 atm, 23 ° C, 90% relative humidity).
- Patent application WO2003078734A1 entitled “Composition for surface treatment of paper” describes a surface treatment of paper and cardboard with inorganic nanoparticles and mixtures of organic pigments in the form of a plate, in aqueous solution that act as hydrophobic agent, antifoam, bleach, improvement The quality of printing on paper and also is low cost.
- Silica nanoparticles and precipitated CaC0 3 or mixtures of both.
- the nanoparticles are dispersed in latex (polymer) selected from the group: butadiene styrene, acrylate, styrene acrylate, polyvinyl acetate and mixtures thereof.
- WO0076862A1 and ES2304963T3 named "Multilayer resin / paper laminate structure, containing at least one layer of polymer / nano-clay compound and packaging materials made therefrom” describes a laminated structure for packaging and other applications other than packaging comprising : a paper substrate and at least one layer of polymer / nano-clay compound comprising nano-clay particles with a thickness ranging from 0.7 to 9.0 nanometers applied to said paper substrate (4), wherein said layer of polymer / nano-clay compound It is composed of a mixture of a polymer resin with a barrier effect and a nano-clay, where said nano-clay is dispersed in the barrier polymer resin on a nanometric scale and the amount of nano-clay in the compound layer represents between 0.5 and 7.0% by weight of the compound layer.
- the CN1449913A patent entitled “Nano particle water-proof corrugated paper board” describes a corrugated waterproof paper. It consists of several layers of lined kraft cardboard and corrugated papers as raw materials that are respectively placed between Kraft lining plates. Said kraft plates and raw materials are subjected to the process of immersion in oil and moisture resistance treatment, subsequently they are protected by a microparticulate adhesive containing calcium nanocarbonate.
- Patent application CN101623853A entitled “Fu 11 resin waterproof sand paper” claims a waterproof resin sandpaper, comprising six layers of an abrasive layer, an adhesive layer, a base layer for the adhesive, a surface layer treated with sandpaper, an original layer of sandpaper, and a waterproof treatment layer from top to bottom, where the adhesive layer is a mixture of urea formaldehyde resin, red iron and ammonium chloride;
- the base adhesive layer is a mixture of water soluble acrylic resin, ammonium resin, fluorine and red iron;
- the sandpaper treated surface layer is a nanometric styrene-butadiene latex rubber cord, a modified starch solution, water and JFS penetrating agent;
- the waterproof treatment layer is a mixture of nanometric styrene-butadiene latex, a modified starch solution, and JFS penetrating agent.
- Document CN2871192Y entitled “The environmental protective decoration paper material” describes a type of paper material for decoration and environmental protection, which comprises corrugated cardboard in which a waterproof nano layer has been fixed.
- the above corrugated cardboard is made of corrugated BE cards, and can have one or more BE cards.
- the invention not only has the functions of resistance to water, or fire but also protection of the environment and a low price.
- Nano particle water-resistant corrugated cardboard describes a water-resistant nano-particulate corrugated cardboard by adopting nano-grade calcium carbonate particle technology.
- the invention includes a plurality of layers of leather and corrugated cardboard, arranged between the layers of leather.
- the layers of leather and corrugated cardboard are joined by a bond of calcium carbonate nano particles.
- the utility of the invention is oriented for food packaging and the transport of large goods.
- JP2009173909A patent application called "Process for production of cellulose nanofiber, and catalyst for oxidation of cellulose” the production of nanocellulose from 4-hydroxy tempo derivatives that provide hydrophobicity is mentioned.
- the patent application JP2001163371A called "Packaging body having inorganic compound layer” mentions a method to improve the gas barrier properties for a pregnant body which consists in coating the body of the reservoir with a sol gel or with a nanocomposite for create a film on the surface of the container which improves the gas impermeability properties.
- Patent EP1925732A1 entitled “Packaging material with a barrier coating” describes a packaging material for solid or liquid assets containing paper, cardboard, cardboard, fabrics, wool, wooden articles, natural cellulose, plastic or its compounds, the which comprises a moisture resistant and active layer of polymers with suspended microparticles and / or micro-clays.
- An independent claim is a method of manufacturing (A) a linear polymeric coating, which takes place after the preparation of base material, or in the process of separation.
- EP1736504A1 entitled “Barrier material and method of making the same” describes the barrier properties of a water-soluble gas impermeable material is improved if the material is mixed with calcium carbonate nanoparticles which are 10 to 10 in size. 250 nanometers
- the barrier material is found in a substrate to provide a substrate with gas impermeability properties.
- a layer of heat sealable material can be applied to the exposed surface of the barrier material.
- a method for manufacturing the coated substrate is also described.
- the substrate can be paper, cardboard or cardboard.
- the Nanocoverage was investigated by a scanning electron field emission electron microscope (FEG-SEM), an atomic force microscope (AFM), an X-ray emitted photoelectron (XPS) spectroscope and a contact angle measurement with Water.
- FEG-SEM scanning electron field emission electron microscope
- AFM atomic force microscope
- XPS X-ray emitted photoelectron
- the highest contact angles with water on the nano-coated cardboard surface were more than 160 °.
- the falling water droplets were able to bounce off the surface, which is illustrated with high-speed video system images.
- the coating showed sticky nature, creating high adhesion to water droplets as soon as the movement of the drops stopped.
- Nanocoverage with full substrate coverage occurred at line speeds of up to 150 m / min. Therefore, the LFS coating has to expand the potential at the industrial level as an economical and efficient method for large coating volumes at high speeds online.
- a single microscale structured coating is formed to favor the improvement in gloss, printing properties (inkjet printing test and off-set printing test) , surface hydrophobicity (with a maximum water contact angle of 140 °) and water repellency (reduction of values - Cobb).
- the interaction of the nanoparticle layers with the cellulose paper results in the improvement of the mechanical strength of the paper and is attributed to the hydrogen bonds between the nanoparticles and the cellulosic fibers.
- nanoparticles dispersed in polymeric substrates
- Cellulose nanofibers derived from 4 TEMPO hydroxy, biopolymer nanofibers, inorganic or resin nanofibers, are another type of nanomaterials used in the manufacture of paper and / or cardboard with hydrophobic properties. In some scientific articles the use of certain treatments was found, such as the application of silicon or titanium oxides by means of the "Liquid F ⁇ ame Spray” process.
- Figure 1 shows a silane bond formation scheme on the surface of silicon oxide nanoparticles formed according to the invention.
- Figure 2 shows a scheme of formation of a crust by polymerization of fluorocarbon compounds in the nanoparticles according to the invention.
- Figures 3 ⁇ , 3B and 3C show a scheme of physicochemical fixation of silicon oxide nanoparticles with paper or cardboard fibers by dehydration of the free silane groups according to the invention.
- Figure 4 shows by block diagram the steps of the application process of hydrophobic coatings on paper and cardboard based on self-assembled silicon oxide nanoparticles according to the present invention.
- Figure 5 shows a photograph of the water contact angle of the paper or cardboard of the present invention.
- Figure 6 shows a photomicrograph obtained by scanning electron microscopy of a paper or cardboard of the state of the art without coating, where the cellulose fiber matrix is illustrated.
- Figure 7 shows a microfotog raffia obtained by scanning electron microscopy of a cellulose fiber of a paper of the state of the art without coating.
- Figure 8 shows a microfotog raffia obtained by scanning electron microscopy of a paper or cardboard with a Michelman® type coating according to the state of the art, where it is illustrated that the cellulose fiber matrix is covered by a film type coating.
- Figure 9 shows a microfotog raffia obtained by scanning electron microscopy of a cellulose fiber of a paper or cardboard with a Michelman® type coating according to the state of the art, where the film-like coating that extends to other fibers is observed of cellulose.
- Figure 10 shows a reliable microfotype obtained by scanning electron microscopy of a paper or cardboard with a coating according to the invention, where it is illustrated that there is no film formation on the matrix, but that it is the cellulose fibers that They are covered.
- Figure 11 shows a microfotog raffia obtained by scanning electron microscopy of a cellulose fiber of a paper or cardboard with a coating according to the invention, where the coating on the cellulose fiber is observed.
- Figure 12 shows a microfotog raffia obtained by scanning electron microscopy of the cellulose fibers of the paper or cardboard coated with silicon oxide nanoparticles according to the present invention.
- the Cobb value indicates the water absorption capacity in papers and cartons, as well as the amount of liquid that penetrates them; that is, it indicates the weight of water absorbed in a specified time per 1 m 2 of paper or cardboard under normal conditions.
- hydrophobicity properties are conferred to paper and cardboard through the use of self-assembled and functionalized silicon oxide nanoparticle coatings with groups fluorocarbons and silane groups, in a hydro-alcoholic colloidal dispersion stirred by ultrasound.
- the fluorocarbon groups used are, for example: 2,3,5,6-tetrafluoro-4-methoxystyrene, monomers of acrolamidafluorinated or 1H, 1H, 2H, 2H-perfluorooctyltriethoxysilanes.
- the groups of the silane type used are: 3-Mercaptopropyltrimethoxysilane (MPTMS), Glycidoxypropyltrimethoxysilane (GLYMO), Bis [3- (triethoxysilyl) propyl] tetrasulfide (TETRA-S), Bis-triethoxy-silyleneethane (BTSE), Dichlorodiphenylsnopynoxypropylene ethnoxypropylene ethnoxy , l, 2-Bis (chlorodimethylsilyl) ethane, N- [3- (trimethoxysilyl) propyl] aniline, Aminopropyltriethoxysilane (APTES), 3-
- the hydrophobic characteristics of silicon oxide nanoparticle coatings on paper are maximized when the paper is immersed in the continuously stirred hydro-alcoholic suspension by some mechanical means, whether supported by ultrasound or not, and the resulting coating is dried and dried. curing at temperatures of about 80 ° C to about 170 ° C. Once the heat has been applied to evaporate the solvents contained in the dispersion and at the same time promote the anchoring or direct bonding of the particles on the paper fibers, it is possible to obtain Cobb values of approximately 8 g / m 2 to approximately 25 g / m 2 .
- This invention stands out from the previous ones, because the coating application procedure does not affect the printing of paper or cardboard, further improving adhesion on the fins or areas that require sticking of the cardboard boxes obtained.
- the process of application of the coating, according to the present invention, on paper and cardboard does not prevent the recycling of the packaging and facilitates its adaptation to the industrial box making machines.
- the paper and cardboard products thus produced have high levels of moisture resistance and high water-coating contact angle.
- a fundamental concept when considering the use of hybrid materials or composite materials to achieve a certain functionality in a material such as the hydrophobicity of cellulose and its derivatives is the compatibility between organic or polymeric materials and inorganic materials.
- This compatibility is usually characterized by having a certain degree of antagonism, since many of the inorganic materials have a hydrophilic character, while the polymers have a hydrophobic character.
- this property that can be antagonistic in the materials separately can have a synergistic effect in one direction or the other as required in hybrid or composite materials.
- the adhesion between inorganic materials and the polymer matrix can be attributed to a series of mechanisms that can occur in the interface, such as isolated phenomena or by interaction between them.
- the physical and chemical methods of modifying the interface promote different levels of adhesion between the inorganic material and the polymer matrix.
- Physical treatments can change the structural and surface properties of inorganic aggregates by influencing mechanical bonds with the polymer matrix.
- many strongly polarized aggregates are incompatible with hydrophobic polymers.
- two materials are incompatible, one can act by introducing a third material called coupling agent, which has intermediate properties between the other two, and thus create a degree of compatibility.
- Chemical compounds containing methanol groups form stable covalent bonds with cellulose fillers. Hydrogen bridge bonds between the aggregate and the matrix can also be formed in this reaction.
- the surface energy of inorganic aggregates is closely related to hydrophilicity and the hydrophobicity of composite materials.
- Silanes as coupling agents that can contribute to hydrophilic or hydrophobic properties of the interface.
- Organosilanes are the main group of coupling agents for polymers with glass or silicon oxide aggregates. Silanes have been developed to couple different polymers to mineral aggregates in the manufacture of composite materials.
- the organic functional group (R) in the coupling agent is the one that produces the reaction with the polymer. It acts as a copolymerization agent and / or for the formation of an interpenetration network. Alkalosilanes undergo hydrolysis, in the stage of bond formation in both acidic and basic media. These Silane reactions with the hydroxyl of the surface of the aggregates, can lead to the formation of polysiloxane structures.
- Self-assembly can be defined as the spontaneous formation of complex structures from smaller pre-designed units.
- Self-assembled monolayers are ordered molecular units that are formed by the spontaneous adsorption (chemisorption) of a surfactant on a substrate, the first containing a functional group with affinity to that substrate.
- the TEOS that dissolves in an ethanol-water mixture and stabilizes at a pH of approximately 3.5 to approximately 3.75 has been used as a starting product. It is allowed to react at temperatures of about 25 ° C to about 40 ° C for a time of about 15 minutes to about 90 minutes, forming a transparent or white colloidal solution.
- TEOS tends to hydrolyse generating nuclei of formula
- silanes such as: 3-mercaptopropyltrimethoxysilane (MPTMS), glycidoxypropyltrimethoxysilane (GLYMO), bis [3- (trimethoxysilyl) propyl] tetrasulfide (TETRA-S), bis-triethoxy-silylene (BTSE), dichlorodiphenyls , 3- isocyanatopropyltrimethoxysilane, l, 2-bis (chlorodimethylsilyl) ethane, n- [3-]
- the third phase of the synthesis process of functionalized silicon oxide nanoparticles consists in the creation of the nanoparticle cortex.
- the bark of these nanoparticles is made up of chains of fluorocarbon molecules. These cortices are prepared by polymerization or condensation reactions on the surface of the nanoparticle cores. Depending on the type of functional group, different molecules are used for the formation of the fluorocarbon cortex.
- these catalysts are of the acid type, such as carboxyl groups, compounds of Cu (I), basic medium such as ammonia or potassium carbonate.
- a reaction scheme is shown in Figure 2. It is necessary to use a bis-silane, such as BAS, TETRA-S or BTSE and the fluorocarbon compound with silane groups. These reactions are done at pH 3.5 and allowed to react 30 minutes at 25 ° C. From these reactions in three stages, particles of sizes between 10 nm and 130 nm have been prepared.
- Fluorocarbon groups such as 2,3,5,6-tetrafluoro-4-methoxystyrene, acrolamidafluorinated monomers or lH, lH, 2H, 2H-perfluorooctyltriethoxysilanes have been used.
- Silane-type groups such as: 3-mercaptopropyltrimethoxysilane (MPTMS), glycidoxypropyltrimethoxysilane (GLYMO), bis [3- (triethoxysilyl) propyl] tetrasulfide (TETRA-S), bis-triethoxy-silylenetane (BTSE), dichlorodiphenylsilane, ethoxypropyl-ethyloxy-ethynoxy-ethyloxy-ethyloxyane 1,2-bis (chlorodimethylsilyl) ethane, n- [3- (trimethoxysilyl) propyl] aniline, aminopropyltriethoxysilane (APTES), 3- (mercaptomethyl) octyl) silanotriol, 2- (2-mercaptoethyl) pentyl) silanotriol, bis- ( triethoxysilyl) propyl] amine (BA
- ultrasonic dispersion is carried out by an ultrasonic generator through one or more piezoelectric transducers that transform the electrical signal into mechanical vibration. This vibrational energy is transmitted to the liquid at a frequency of up to 200,000 oscillations per second. These pressure and vacuum oscillations create a large number of microbubbles, which implode at high speed contributing to the breakdown of nanoparticle clusters.
- the dispersion of the self-assembled nanoparticles is carried out in a hydro-alcoholized medium, where the dispersion has a density of about 0.96 g / cm 3 to about 0.99 g / cm 3 and a pH of about 3 to about 4.5.
- the alcohol used to prepare the dispersion can be ethanol, propanol, methanol and combinations thereof.
- This heat treatment is key to obtain a superhydrophobic coating on the surface of the paper or cardboard.
- step 100 in case of not having the self-assembled nanaoparticles, a synthesis by self-assembly of silicon oxide nanoparticles with functional groups of silanes and fluorocarbon compounds in a hydro medium is carried out -alcoholized agitated by ultrasound.
- a dispersion is prepared by stirring by mechanical means of self-assembled silicon oxide nanoparticles with functional groups of silanes and flurorcarbon compounds in a hydro-alcoholized medium.
- the dispersion of the nanoparticles can be supported by the application of ultrasound with a continuous or pulsed frequency of about 10 Hz to about 150 KHz.
- the dispersion is applied to at least one surface of the paper or cardboard where the hydrophobicity property is required.
- This application can be by immersion-extraction of paper or cardboard in the dispersion of nanoparticles, in order to react and link the Si-OH groups of the nanoparticles with the -OH groups of the cellulose fibers of the paper or cardboard.
- This application in turn can be dosed and evenly distributed on the surface of the paper or cardboard by means of a scraper.
- step 400 the paper or cardboard is dried and cured to directly bind the self-assembled silicon oxide nanoparticles with functional groups of silanes and flurcarbon compounds to the cellulose fibers of the paper or cardboard.
- the drying and curing process is key to obtaining a superhydrophobic coating on the surface of the paper or cardboard; that is to say, it is the heat that collaborates directly in the fixation of the nanomaterials on the surface of the paper or cardboard generating not only this link with the fibers but also promotes the interactions between the nanoparticles so that a nanostructured coating is produced that allows a greater lotus effect, making the paper have a greater resistance to moisture.
- the improvement in Cobb values depends directly on the their dehydration process and the cross-linking phenomenon of Si-OH groups and their interaction with cellulose fibers. This interaction, generates that a greater amount of these groups react and increase the union of the silicon oxide nanoparticles to the surface of each fiber, so that through the increase of the temperature and the curing time the optimization of the Cured cellulosic surface.
- the fiber of the paper or cardboard loses a certain amount of chemically bound water, which after the curing process must be recovered to avoid a destabilization in the accommodation and fiber stiffness.
- the curing conditions for preparing a paper or cardboard of the present invention with Cobb values close to 20 g / m 2 correspond to a temperature of 150 ° C and a time of 180 seconds using a time of immersion in the suspension of 10 seconds and coating amounts close to 3.5 g / m 2 .
- the contact angle of water on the surface with self-assembled nanoparticles in the paper or cardboard of the present invention is from about 100 ° to about 140 ° as illustrated in Figure 5.
- hydroalcoholic colloidal dispersion of nanoparticles with fluorocarbons with a density of 0.98 g / cm 3 and a pH of 3.6 was used. This suspension was stirred with ultrasound for 30 minutes. Once the stirring process was finished, the suspension was emptied into a tray and the paper began to be coated.
- Table 1 shows the temperature conditions of the different critical parameters in the process.
- the production speed was 80 m / min. In this test it was observed that when the dispersion is stopped stirring, the product in the tray is not homogeneous, so the stirring was started again, in this way it was observed that the effect diminished until it was homogeneous again.
- Table 3 shows the temperature conditions of the different critical parameters in the process.
- the production speed was 80 m / min.
- Table 4 shows a comparison of the Cobb values obtained, the contact angles, the speed of the water and the amount of material used for each test.
- the amount of material per square meter is less than 1 g / m 2 in tests in general, the best Cobb values are 15 in cardboard where contact angles greater than 128 ° and low liquid penetration were achieved. Contact angles far superior to those obtained with commercial Michelman® type coatings.
- Figures 6 to 11 illustrate a photomicrograph obtained by scanning electron microscopy for both a paper or cardboard of the state of the art without coating (see Figure 6) and respective detail of cellulose fiber (see Figure 7), a paper or cardboard with a Michelman® type coating according to the state of the art (see Figure 8) and respective detail of cellulose fiber (see Figure 9), as well as a paper or cardboard with a coating according to the invention (see Figure 10 ) and respective detail of cellulose fiber (see Figure 11), so that the comparative effect between a film-like coating (see Figures 8 and 9) can be seen with the fiber coating effect of the present invention (see Figures 10 and 11).
- Table 4 also shows the results obtained based on Cobb values, contact angle and water flow rate.
- Table 4 it is possible to observe very low Cobb values in all tests (from 16.7 Qagua / rn 2 to 26.8 g ag ua / m 2 ) corresponding to water flow rates of 0.036 g / s to 0.005 g / s, which It shows a significant reduction in the passage of water in both paper and cardboard due to the coating.
- the contact angle measurement was used and to measure the moisture absorption capacity of paper and cardboard, the IMPEE-PL020 and TAPPI standards were used, which allow quantifying Cobb values and penetration speed. of the water.
- the nanostructured hydrophobic coating prepared and applied in accordance with the present invention does not affect the printing of paper or cardboard and improves adhesion on the fins or areas that require bonding of the boxes of cardboard obtained. This is due to the fact that silicon oxide nanoparticles are directly linked to cellulose fibers as shown in Figure 5, unlike other commercial products where a monolithic layer is formed that covers the surface of the paper or cardboard by modifying the printing and the glue of the cardboard when making the boxes. In addition, from tests at the industrial level, it was confirmed that well-dispersed silicon oxide nanoparticles nano-structured coatings reduce the amount of hydrophobic material required per unit of paper or cardboard surface, facilitating the recycling process of said packages.
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Abstract
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Priority Applications (6)
Application Number | Priority Date | Filing Date | Title |
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EP13775835.5A EP2837736B1 (en) | 2012-04-13 | 2013-04-12 | Hydrophobic paper or cardboard with self-assembled nanoparticles and method for the production thereof |
US14/394,090 US9783930B2 (en) | 2012-04-13 | 2013-04-12 | Hydrophobic paper or cardboard with self-assembled nanoparticles and method for the production thereof |
ES13775835T ES2743051T3 (es) | 2012-04-13 | 2013-04-12 | Papel o cartón hidrófobo con nanopartículas auto-ensambladas y método para elaborarlo |
BR112014025470-2A BR112014025470B1 (pt) | 2012-04-13 | 2013-04-12 | Papel ou papelão hidrofóbico incluindo fibras de celulose e nanopartículas de óxido de silício automontadas, e seu método de produção |
CA2870127A CA2870127C (en) | 2012-04-13 | 2013-04-12 | Hydrophobic paper or cardboard with self-assembled nanoparticles and the method for producing thereof |
CR20140474A CR20140474A (es) | 2012-04-13 | 2014-10-14 | Papel o carton hidrofobico con nanparticulas auto-emsambladas y metodo para elaborarlo |
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MX2012004387A MX366743B (es) | 2012-04-13 | 2012-04-13 | Papel o cartón hidrofóbico con nanopartículas auto-ensambladas y método para elaborarlo. |
MXMX/A/2012/004387 | 2012-04-13 |
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WO2013154414A1 true WO2013154414A1 (es) | 2013-10-17 |
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US (1) | US9783930B2 (es) |
EP (1) | EP2837736B1 (es) |
BR (1) | BR112014025470B1 (es) |
CA (1) | CA2870127C (es) |
CR (1) | CR20140474A (es) |
ES (1) | ES2743051T3 (es) |
MX (1) | MX366743B (es) |
PT (1) | PT2837736T (es) |
WO (1) | WO2013154414A1 (es) |
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US20150231821A1 (en) * | 2012-09-25 | 2015-08-20 | Stora Enso Oyj | Method for the manufacturing of a polymer product with super- or highly hydrophobic characteristics, a product obtainable from said method and use thereof |
US9783930B2 (en) * | 2012-04-13 | 2017-10-10 | Sigmaq Alimentos, S.A. De C.V. | Hydrophobic paper or cardboard with self-assembled nanoparticles and method for the production thereof |
CN110452307A (zh) * | 2019-07-24 | 2019-11-15 | 衢州学院 | 一种改性纳米纤维素及其制备方法 |
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US10392752B2 (en) * | 2013-05-22 | 2019-08-27 | Dow Global Technologies Llc | Paper composition and process for making the same |
CA2914146A1 (en) | 2013-06-03 | 2014-12-11 | Oji Holdings Corporation | Method for producing sheet containing fine fibers |
US9512338B2 (en) * | 2014-04-29 | 2016-12-06 | Greif Packaging Llc | Method for manufacturing an adhesive compound for use in the production of corrugated paperboard |
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CN110452307B (zh) * | 2019-07-24 | 2021-05-11 | 衢州学院 | 一种改性纳米纤维素及其制备方法 |
Also Published As
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US9783930B2 (en) | 2017-10-10 |
ES2743051T3 (es) | 2020-02-18 |
EP2837736B1 (en) | 2019-05-22 |
PT2837736T (pt) | 2019-09-05 |
CR20140474A (es) | 2014-11-05 |
MX366743B (es) | 2019-07-04 |
MX2012004387A (es) | 2014-04-08 |
US20150330025A1 (en) | 2015-11-19 |
BR112014025470A2 (pt) | 2017-06-20 |
EP2837736A4 (en) | 2015-12-09 |
EP2837736A1 (en) | 2015-02-18 |
CA2870127A1 (en) | 2013-10-17 |
BR112014025470B1 (pt) | 2021-06-29 |
CA2870127C (en) | 2018-01-16 |
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